If you have never been to Yellowstone one of the first lessons to learn is that if there is an animal of any kind, traffic will stop. Mostly we are talking about elk, moose and bison. There is the "stop in the middle of the road because I have never seen an animal before and have to take a picture right here and now" kind of stop which can be aggravating as then everyone in line stops and does the same. Grrr.
Then there is the more reasonable "Holy crap there is a huge Volkswagen sized buffalo staring me down in the middle of the road and I surrender" kind of stop - shown below.
This road crossing of the herd seems to start with the alpha bison wandering to the middle of the road, stopping and glaring in either direction daring anyone to proceed (and winning), and then waiting while the rest of the gang crosses.
This is my attempt to take a picture when a large bison wandered in front of us while driving and then angled, it seemed to me anyway, right toward my open window. The camera shot took second place to me rolling up my window.
Yellowstone is a mythic blending of fire, water, air and earth. Water falls from the sky, finds it's way deep into the earth and according to a ranger we heard speak, this journey can take up to 500 years to subsequently be heated by the hot spot, that is underneath Yellowstone and rise in the form of steam, geysers or mud pots.
One not to miss earthly wonder is the Travertine Terraces at Mammoth Hot Springs.
Briefly, great amounts of limestone are heated, dissolved and pressured up to the surface. As this solidifies it turns into travertine - yes similar I guess to your kitchen counter travertine. Actually the mountains in the area are all mostly travertine from millions of years of this ongoing process. When all factors are good these terraces can grow up to 3 feet/year moving and re-sculpting as it wants!
Another mythic beauty
The Midway Geyser Basin is where the Grand Prismatic Springs astound and mystify.
Just like the Terraces, there is a multitude of color, even brilliant, that is actually pigmented bacteria.
The variety of Yellowstone is awesome including the stark results of many different fires.
The Yellowstone river courses through the Park with all it's different moods.
And...
Before we left, Joanie brought my attention to another earthly anomaly and no matter what I said, she insisted it should be included as one of Yellowstone's wonders.